<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		/*.father>p{
			color: red;
		}*/
		.father>ul>li{
			width: 100px;
		}
		.container{
			color: red;
		}
	</style>
</head>
<body>
	<div class="father">
		<p>alex</p>
		<p>alex</p>
		<p>alex</p>
		<p>alex</p>
		<div class="content">
			<p>wusir</p>
		</div>
		<ul>
			<li>
				alex2
				<ul>
					<li>wusir</li>
				</ul>
			</li>
		</ul>
	</div>

	<div class="container">
		<p>日天</p>
	</div>

</body>
</html>